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Topological insulators
Topological insulators

Lecture 22 Relativistic Quantum Mechanics
Lecture 22 Relativistic Quantum Mechanics

... Why study relativistic quantum mechanics? ...
Testing the Symmetrization Postulate of Quantum Mechanics and
Testing the Symmetrization Postulate of Quantum Mechanics and

... be symmetric in the exchange of two nuclei. Since the nuclear spin is zero, wn is obviously symmetric. The vibrational wave function wv is also unaltered in the exchange of the nuclei because it depends only on the magnitude of the internuclear distance. Since the total wavefunction wt must be symme ...
Monday, Apr. 18, 2005
Monday, Apr. 18, 2005

Design and proof of concept for silicon-based quantum dot
Design and proof of concept for silicon-based quantum dot

... Figure 3 provides insight into the operation of the device. Results are shown for two configurations of the gate voltages, corresponding to points A and B in Fig. 2. For case A, corresponding to a low barrier ( | Vin | << | Vout | ), the potential landscape becomes an elongated trough, with signific ...
Fiber Bundles and Quantum Theory
Fiber Bundles and Quantum Theory

... rotation, both probability amplitudes change their sign. It takes 2 full turns (i.e., 720 degrees of rotation) to restore the probability amplitudes to their initial values. This feature of Quantum Theory may at first seem paradoxical. When an ordinary object makes a complete rotation in space, it r ...
Evidence for reversible control of magnetization in magnetic field
Evidence for reversible control of magnetization in magnetic field

Relativistic Quantum Mechanics
Relativistic Quantum Mechanics

... The fact that quantum states of free relativistic particles are fully defined by the Lorentz transformation supplemented by the space-time translation was discovered by Wigner. Here we will follow his idea in a qualitative way just to get the main concept across. First, we note that Lorentz transfor ...
Near-band-gap photo-induced nuclear spin
Near-band-gap photo-induced nuclear spin

***** 1
***** 1

Large quantum superpositions of a levitated nanodiamond through spin-optomechanical coupling
Large quantum superpositions of a levitated nanodiamond through spin-optomechanical coupling

Correlated many-electron states in a quantum dot containing a
Correlated many-electron states in a quantum dot containing a

... product of two single-particle wave functions of those two ជ of the exchanged quantum states calculated at position R impurity. They build up a submatrix called the exchange interaction matrix. The size of this matrix is determined by the number of orbitals that are taken into account in our calcula ...
Valley polarization assisted spin polarization in two dimensions
Valley polarization assisted spin polarization in two dimensions

... has been successful, and strained silicon has been in use in microelectronics since the 90-nm node3. More recently, however, the valley degree of freedom is becoming recognized as an opportunity, rather than a hindrance, and this is leading to the emergence of a field of research now known as valleyt ...
Document
Document

FCRP Logo - International Technology Roadmap for
FCRP Logo - International Technology Roadmap for

Deconfined Quantum Criticality
Deconfined Quantum Criticality

Coulomb and Spin-Orbit Interaction Effects in a
Coulomb and Spin-Orbit Interaction Effects in a

Frustrated Quantum Magnetism with Laser-Dressed Rydberg Atoms
Frustrated Quantum Magnetism with Laser-Dressed Rydberg Atoms

Spin-Orbit Interactions in Topological Insulators
Spin-Orbit Interactions in Topological Insulators

Atom-Light Interactions - Durham University Community
Atom-Light Interactions - Durham University Community

... In the Schrödinger picture that we have considered thus far, the application of the classical light field causes the atom to oscillate between the ground and excited states. If we think in terms of energy transfer, then the conservation of energy implies that energy must be transferred to and from ...
LAUDISA, Counterfactual reasoning, realism and QM_last version
LAUDISA, Counterfactual reasoning, realism and QM_last version

Helimagnetic structure of YMn2 observed by means of nuclear
Helimagnetic structure of YMn2 observed by means of nuclear

... the possibility of double-axial helical structures arises and is discussed. In this study, all the inconsistency among previously reported NMR spectra is removed, and the strong frequency dependence of the spin-echo decay time T2 found unexpectedly is explained in terms of a phenomenological model t ...
Magnetic ordering of nuclear spins in an interacting two-dimensional electron... Pascal Simon, Bernd Braunecker, and Daniel Loss
Magnetic ordering of nuclear spins in an interacting two-dimensional electron... Pascal Simon, Bernd Braunecker, and Daniel Loss

Magnetic polyoxometalates: from molecular magnetism to molecular spintronics and quantum computingw
Magnetic polyoxometalates: from molecular magnetism to molecular spintronics and quantum computingw

Fractional excitations in the square lattice quantum antiferromagnet
Fractional excitations in the square lattice quantum antiferromagnet

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Spin (physics)

In quantum mechanics and particle physics, spin is an intrinsic form of angular momentum carried by elementary particles, composite particles (hadrons), and atomic nuclei.Spin is one of two types of angular momentum in quantum mechanics, the other being orbital angular momentum. The orbital angular momentum operator is the quantum-mechanical counterpart to the classical notion of angular momentum: it arises when a particle executes a rotating or twisting trajectory (such as when an electron orbits a nucleus). The existence of spin angular momentum is inferred from experiments, such as the Stern–Gerlach experiment, in which particles are observed to possess angular momentum that cannot be accounted for by orbital angular momentum alone.In some ways, spin is like a vector quantity; it has a definite magnitude, and it has a ""direction"" (but quantization makes this ""direction"" different from the direction of an ordinary vector). All elementary particles of a given kind have the same magnitude of spin angular momentum, which is indicated by assigning the particle a spin quantum number.The SI unit of spin is the joule-second, just as with classical angular momentum. In practice, however, it is written as a multiple of the reduced Planck constant ħ, usually in natural units, where the ħ is omitted, resulting in a unitless number. Spin quantum numbers are unitless numbers by definition.When combined with the spin-statistics theorem, the spin of electrons results in the Pauli exclusion principle, which in turn underlies the periodic table of chemical elements.Wolfgang Pauli was the first to propose the concept of spin, but he did not name it. In 1925, Ralph Kronig, George Uhlenbeck and Samuel Goudsmit at Leiden University suggested a physical interpretation of particles spinning around their own axis. The mathematical theory was worked out in depth by Pauli in 1927. When Paul Dirac derived his relativistic quantum mechanics in 1928, electron spin was an essential part of it.
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